Abstract
We discuss angular distributions and some kinematic features for jets originating from the decay of orbitally excitedQ \(\bar Q\) states. These can be produced ine + e − storage rings via the radiative decay of the first radial excitedQ \(\bar Q\) vector meson. We further present the complete and explicit angular distribution for the cascade decaye + e − → 23 S 1 →γ 1+3 P j,3 P j →γ 2+13 S 1, 13 S 1 →μ + μ − in all casesj=0, 1, 2. These distributions serve as a test of the spinj of intermediate states inQ \(\bar Q\) systems. By the photon—gluon analogy they can successfully be applied to the jet process, too.
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Krasemann, H. Jets fromQ \(\bar Q\) P waves. Z. Phys. C - Particles and Fields 1, 189–198 (1979). https://doi.org/10.1007/BF01445410
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DOI: https://doi.org/10.1007/BF01445410